b. After the QR code is recognized, select [Broadcast] to broadcast the transaction to the blockchain network.

2）Uploading Signed Transaction Data with MicroSD

a. Once you signed the transaction on Cobo Vault, touch [Export] (if the signed transaction displays as QR code, touch [export via micoSD]>[Export]) to export the signed transaction data as a .txt file to your microSD card.

b.Take the microSD out of your Cobo Vault and insert it into your personal computer or smartphone running Electrum.

c. In the Electrum menu bar, select [Tools]>[Load transaction]>[From file], then find the signed transaction file in the microSD card root directory and open it.

d. Once the signed transaction data is uploaded to Electrum, select [Broadcast] to broadcast the transaction to the blockchain network.

Notes:

1. Electrum cannot recognize dynamic QR codes, and static QR codes only have capacity for around 8 inputs, 2 outputs, and the corresponding signing data (capacity may be affected by differences in screen resolution and camera on the device used for Electrum). When transaction data is too large to be transmitted via static QR code and Cobo Vault is unable to recognize or display a QR code, please use your own microSD card to transmit transaction data.

2. Cobo Vault automatically checks and marks the change address for you as a security measure against phishing attacks on Electrum, which may attempt to insert change addresses that do not belong to you. However, these functions only work for the first 100 change addresses Cobo Vault creates by default, and will not continue working for change addresses you create after initializing the device. Later, we will add support for manually adding an unlimited number of change addresses to the list Cobo Vault will check for in Electrum transactions.